192   // Should be LDR_CNTRL SHMPSIZE.
 193   static int shm_default_page_size(void) {
 194     assert(_shm_default_page_size != -1, "not initialized");
 195     return _shm_default_page_size;
 196   }
 197 
 198   // Return true if sys V shm can be used with 64K pages dynamically
 199   // (via shmctl(.. SHM_PAGESIZE..).
 200   static bool can_use_64K_pages () {
 201     assert(_can_use_64K_pages != -1,  "not initialized");
 202     return _can_use_64K_pages == 1 ? true : false;
 203   }
 204 
 205   // Return true if sys V shm can be used with 16M pages dynamically.
 206   // (via shmctl(.. SHM_PAGESIZE..).
 207   static bool can_use_16M_pages () {
 208     assert(_can_use_16M_pages != -1,  "not initialized");
 209     return _can_use_16M_pages == 1 ? true : false;
 210   }
 211 
 212   static address   ucontext_get_pc(ucontext_t* uc);
 213   static intptr_t* ucontext_get_sp(ucontext_t* uc);
 214   static intptr_t* ucontext_get_fp(ucontext_t* uc);
 215   // Set PC into context. Needed for continuation after signal.
 216   static void ucontext_set_pc(ucontext_t* uc, address pc);
 217 
 218   // This boolean allows users to forward their own non-matching signals
 219   // to JVM_handle_aix_signal, harmlessly.
 220   static bool signal_handlers_are_installed;
 221 
 222   static int get_our_sigflags(int);
 223   static void set_our_sigflags(int, int);
 224   static void signal_sets_init();
 225   static void install_signal_handlers();
 226   static void set_signal_handler(int, bool);
 227   static bool is_sig_ignored(int sig);
 228 
 229   static sigset_t* unblocked_signals();
 230   static sigset_t* vm_signals();
 231   static sigset_t* allowdebug_blocked_signals();
 232 

 192   // Should be LDR_CNTRL SHMPSIZE.
 193   static int shm_default_page_size(void) {
 194     assert(_shm_default_page_size != -1, "not initialized");
 195     return _shm_default_page_size;
 196   }
 197 
 198   // Return true if sys V shm can be used with 64K pages dynamically
 199   // (via shmctl(.. SHM_PAGESIZE..).
 200   static bool can_use_64K_pages () {
 201     assert(_can_use_64K_pages != -1,  "not initialized");
 202     return _can_use_64K_pages == 1 ? true : false;
 203   }
 204 
 205   // Return true if sys V shm can be used with 16M pages dynamically.
 206   // (via shmctl(.. SHM_PAGESIZE..).
 207   static bool can_use_16M_pages () {
 208     assert(_can_use_16M_pages != -1,  "not initialized");
 209     return _can_use_16M_pages == 1 ? true : false;
 210   }
 211 
 212   static address   ucontext_get_pc(const ucontext_t* uc);
 213   static intptr_t* ucontext_get_sp(ucontext_t* uc);
 214   static intptr_t* ucontext_get_fp(ucontext_t* uc);
 215   // Set PC into context. Needed for continuation after signal.
 216   static void ucontext_set_pc(ucontext_t* uc, address pc);
 217 
 218   // This boolean allows users to forward their own non-matching signals
 219   // to JVM_handle_aix_signal, harmlessly.
 220   static bool signal_handlers_are_installed;
 221 
 222   static int get_our_sigflags(int);
 223   static void set_our_sigflags(int, int);
 224   static void signal_sets_init();
 225   static void install_signal_handlers();
 226   static void set_signal_handler(int, bool);
 227   static bool is_sig_ignored(int sig);
 228 
 229   static sigset_t* unblocked_signals();
 230   static sigset_t* vm_signals();
 231   static sigset_t* allowdebug_blocked_signals();
 232